Ok, my tank stats are in my sig. I have a reef octopus NW200 and my trates are high. I'm going to replace my Rodi filters but want something else as filtration. I have no room for an upright ATS, so I want to a horizontal one. My fuge section is about 22x12. Could I just cover the entire top of the fuge with that clear canvas? It would be in water about .5-1" deep. Would that work? I could move my macro to my 20........ I would be using 2 CFL bulb. Can I do anything to make it more affective? Air stone underneath? Any help at all would be appreciated.

How will you be powering the screen? Are you going to plumb it into your overflow or use a pump and have it a separate unit ? How big of a screen are you planning and what size light fixtures? .5 to 1 inch underwater isn't bad but keep it as much out of the water as you can.

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Feed your Filtration
Give it to Porc Chop he'll eat anything!!!!!
"This is my tank and these other fish just live in it"
^ Quoted from Porc Chop^

It's going to be horizontal just in the sump. It will be powered by the flow through the sump. Most of the flow is at the surface. Should I get an air pump and bubble wand to increase water movement under the screen?

Lol no it's not going to do anything . How many pipes are coming from your overflow to the sump? What I did was turn one of my overflow pipes into a scrubber pipe and did it that way. Or you can get a pump and have a PVC pipes shaped like a upside down L and you will have your water go up and over and then it would flow down the screen.

__________________
Feed your Filtration
Give it to Porc Chop he'll eat anything!!!!!
"This is my tank and these other fish just live in it"
^ Quoted from Porc Chop^

Can you post a pic of yours???? I would love to see it. I'm contemplating the pump idea and also the overflow..... Hmm....... I would need to use pvc for the overflow fed scrubber correct? How would I do thisv